Sinoatrial Node D012849

Anatomy [A] » Cardiovascular System [A07] » Heart » Heart Conduction System » Sinoatrial Node

Description

The small mass of modified cardiac muscle fibers located at the junction of the superior vena cava (VENA CAVA, SUPERIOR) and right atrium. Contraction impulses probably start in this node, spread over the atrium (HEART ATRIUM) and are then transmitted by the atrioventricular bundle (BUNDLE OF HIS) to the ventricle (HEART VENTRICLE).   MeSH

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